Apparatus for thawing giant-powder



(ModeL) V T ROSEVEAR & R. BRYANT. APPARATUS FOR THAWING GIANT POWDER.

Patented Dec. 5, 1882..

' WIT ESSES:

- IAT'AIORNEYS.

UNITED STATES PATENT OFFICE.

THOMAS ROS EVEAR AND RICHARD BRYANT, OF NEGAUNEE, MICHIGAN.

APPARATUS FOR THAWING GIANT-POWDER.

SPECIFICATION formingpart of Letters .Patent No. 268,540, dated December 5, 1882.

Application filed September 19, 1882. (ModeL) To all whom it may concern:

Be it known that we, THOMAS BosEvEAR and RICHARD BRYANT, of Negaunee, in the county of Marquette and State of Michigan, have invented a new and Improved Apparatus for Thawing Giant-Powder, of which the following is a full, clear, and exact description.

In mining and other operations requiring the use of giant powder and other high explosives there is frequent loss of life and property from accidental explosions, resulting mainly from the shifts resorted to by miners to Warm their powder sufficiently to blast with; and there is, further, aconsiderable loss of time to the workmen with all the ordinary methods used for warming the explosives.

The object of our invention is, besides that of saving life and property, to provide a convenient and efficient apparatus for the use of workmen in blasting operations, by which the cartridges can be warmed and kept warm until ready for use.

The invention consists in areceptacle adapted for receiving hot water, and provided interiorly with cartridge holders, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure 1 isa sectional elevation of our improved apparatus. Fig. 2 is a plan view with thecover turned back and a portion of the top broken away.

,A is a receptarle of suitable size and form, and provided with'ears a for straps, by which the device is fastened around the breast ofthe workman.

B B are tubes, attached at their upper ends to the top of the vesselA and extending downward therein to within a short distance of the bottom. Any desired number of tubes B may be used, according to the size of the vessel, and they are fitted so that there is space between them for the water.

Upon the top of the vessel A is a rim, b, inclosing the tops of the tubes B, and fitted with a hinged cover, G, which, when closed down upon the rim, prevents access of air to the powder.

At 11, in the top of the vessel A, is an opening for use in filling the vessel with water, which opening is provided with a. screw-cap for closing it.

In the use of the apparatus the powder is placed in the tubes B. The cover 0 is then closed and the vessel filled with hot water, which is always conveniently at hand. It will be seen that the hot water entirely surrounds the tubes B, so that the powder is warmed or thawed and kept in that condition until required for use. At the same time there is no contact of the water with the cart-ridges, and thereby no risk of deterioration by the oil being abstracted by the water. There is, further, no risk of accidental explosion, and no loss of time from the necessity of carrying the cartridges to a place where they can be warmed.

This apparatus is calculated to entirely supersede all of the ordinary expedients used for warming giant-powder, such as plunging the powder into water or placing it around steam pipes and boilers.

We are aware that dinner-buckets have been constructed with a middle provision-chamber THOMAS ROSEVEAR. RICHARD BRYANT.

Witnesses:

HAROLD DURST MCCORD, HANS SIMONSEN. 

